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Home >> Honda >> 2021 >> CR-V EX-L, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 14 (HVAC System - Diagnostics (Hybrid)) >> How to Information >> How to Troubleshoot the Climate Control System (Climate Control Panel Without Display) >> Checking for DTCs

Checking for DTCs

WARNING: This page is about a different variant/trim than selected.
A/C Error Display Screen ID Display No. Parts Name Contents DTC Detection Item
A A1 Ambient TEMP Sensor Open B1227  An open in the outside air temperature sensor circuit
A2 Ambient TEMP Sensor Short B1228  A short in the outside air temperature sensor circuit
A3 Solar radiation Sensor Fail B123F  Automatic lighting control unit/sunlight sensor error
A4  Solar radiation Sensor Variation Unknown --- Unknown sunlight sensor type
A5 Evaporator Sensor Open B1231  An open in the evaporator temperature sensor circuit
A6 Evaporator Sensor Short B1232  A short in the evaporator temperature sensor circuit
B6 Hum-Temp Sensor Comm Error B121D  Humidity/in-car temperature sensor communication error
B7 Hum-Temp Sensor Comm Line Error --- Display "Normal" when humidity/in-car temperature sensor 4P connector disconnected, and connect HUM CLK line and HUM DATA line with a jumper wire.

*: With seat heater

A/C Error Display Screen ID Display No. Parts Name Contents DTC Detection Item
B A1 A/M motor (Dr) Open B1233  An open in the air mix control motor circuit (driver's)
A2 A/M motor (Dr) Short B1234  A short in the air mix control motor circuit (driver's)
A3 A/M motor (Dr) Lock B1235  A problem in the air mix control motor circuit, linkage, door, or motor (driver's)
A4 A/M motor (As) Open B1236  An open in the passenger's air mix control motor circuit
A5 A/M motor (As) Short B1237  A short in the passenger's air mix control motor circuit
A6 A/M motor (As) Lock B1238  A problem in the passenger's air mix control motor circuit, linkage, door, or motor
B1 MODE motor Open B121A  An open in the mode control motor circuit
B2 MODE motor Short B121B  A short in the mode control motor circuit
B3 MODE motor Lock B1240  A problem in the mode control motor circuit, linkage, door, or motor
B4 R/F motor Open B2986  An open in the recirculation control motor circuit
B5 R/F motor Short B1220  A short in the recirculation control motor circuit
B6 R/F motor Lock B2983  A problem in the recirculation control motor circuit, linkage, door, or motor
D A1 Blower motor Lock B1241  A problem in the blower motor circuit
A2 EWP COMM Error B296D Electric water pump communication fail
A3 EWP FAIL B296E  Electric water pump fail
B6 ECOMP SLEEP B2990  A problem in the A/C compressor driving circuit (A problem in the electric A/C compressor driving circuit)
B7 ECOMP INV FAIL B2998  A problem in the A/C compressor driver (A problem in the electric A/C compressor driver)
B8  Lost Communication with ECOMP (FCAN) --- Electric A/C compressor lost communication
I A1 B-CAN BUS OFF U1280  Communication bus line error (BUS-OFF)
A2 Lost Communication with Meter (BCAN) U128D  Climate control unit lost communication with gauge control module
A3 Lost Communication with MICU (BCAN) U1281  Climate control unit lost communication with MICU (body control module)
A4  Lost Communication with AHU (BCAN) --- Climate control unit lost communication with center display unit
A6 * Lost Communication with HCS (BCAN) U1290  Climate control unit lost communication with seat heater control unit (front)
B4 LIN Communication BUS OFF B120A  Climate control unit LIN communication bus line error
B5 Lost Communication with Fr PANEL (LIN) B2964  Climate control unit lost communication with front panel (climate control panel)
B8  EEPROM Data Error --- Climate control unit internal error

*: With seat heater